@nodefony/monitoring-bundle/src/plugins/apollo/nodefonyClientWs.js

import {createClient} from "graphql-ws";
// Apollo Client Web v3.5.10 has a GraphQLWsLink class which implements
// graphql-ws directly. For older versions, see the next code block
// to define your own GraphQLWsLink.
import {GraphQLWsLink} from "@apollo/client/link/subscriptions";

const use = function (url) {

  /* return  createClient({
      url: url,
      on: {
        connected: (socket) => (
          console.log("connect")
        ),
        ping: (received) => {
          console.log(ping)
        },
        pong: (received) => {
            console.log(pong)
        }
      }
    });*/

  return new GraphQLWsLink(createClient({
    url,
    connectionParams: () => {
      const session = null;// getSession();
      return {
        Authorization: "Bearer 1234"
      };
    }
  }));
};

export default use;